<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>数据代理</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
<h2>数据代理：通过一个对象代理对另一个对象中属性的操作（读/写）</h2>

<script type="text/javascript">
    let obj1 = {x: 100}
    let obj2 = {y: 200}

    Object.defineProperty(obj2, 'x', {
        get() {
            console.log('读取了obj1的x属性');
            return obj1.x;
        },
        set(value) {
            console.log('设置了obj1的x属性')
            return obj1.x = value;
        },
    })

</script>

</body>
</html>
